... the flat and even appearance shows emerald color, bright and yellow-green water color, fresh aroma, mellow and sweetish taste. Dragon Well ... It is used to deter food poisoning, refresh the body, stop cavities, fight viruses, control high ... cancer. Hence, LongJing tea is regarded as the elixir for health and is widely sold and ... , from as early as the Three Kingdoms Period (221-280). Dragon Well tea